Concave for threshing-machines.



PATENTED JULY 7, 1908. F. F. LANDIS. GONCAVE FOR THRESHING MACHINES. APPLICATION FILED DBO.13.1901. RENEWED 0011s, 1907.

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N0..892,529. PATENTED JULY 7, 1908.

P. P. LANDIS. GONCAVE FOR THRESHING MACHINES. APPLICATION FILED DEO.13,1901. RENEWED 00T.15, 1907,

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FRANK F. LANDIS, OF WAYNESBORO, PENNSYLVANIA.

CONCAVE FOR THRESI-IING-MACHINES.

Specification of Letters Patent.

Patented July 7, 1908.

Application filed December 13, 1901, Serial No. 85,819. Renewed October 15, 1907. Serial No. 397,565.

To all whom it may concern:

Be it known that I, FRANK F. LANDIS, a citizen of the United States, residing at Waynesboro, in thecounty of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in Concaves for Threshing-Machines, of which the following is a specification.

In the ordinary construction of threshing machines considerable trouble has been experienced in moving or adjusting the con caves for the purpose of changing them, making repairs, etc., the dust and grit becoming so firinly packed in the joints as to render the removal of the concave sections very difiicult, requiring much time and consequent delay of the work and the resulting expense.

The object of my said invention is to provide an improved construction and arrangement of parts for supporting the concave of threshing machines wherby such concave or any section thereof may be quickly and readily removed, replaced and adjusted, as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar reference characters indicate similar parts, Figure 1 is a top or plan view of a portion of the front of a separator, a portion of the cylinder and hopper bottom being broken away to show the parts relating to my invention more clearly. Fig. 2 a longitudinal section through the same on the dotted line 22 in Fig. 1. Fig. 3 a front elevation. Fig' 4 an edge elevation of a wedge-plate used in the construction. Fig. 5 a side elevation of the same, and Fig. 6 a side elevation of one of the concave bearing plates, showing a modified form of the wedge-plate attached thereto. a

In said drawings the portions marked A represent the frame of the machine, B the cylinder, 0 the concave bearers, and D the concave sections.

The frame A is of any appropriate construction, having a table or hopper A, as usual, and provided with the usual devices for supporting the various parts of the mechanism. A peculiar form of 'rate a is provided at the lower end of the hopper A, but as this is the subject matter of a separate application the same will not be particularly described herein.

The cylinder B is also of any usual or appropriate construction and arrangement.

The concave bearers C are preferably plates or castings of the form shown in Fig. 6, being curved and having curved flanges c on their inner faces, which are closed at their inner ends and open at their outer ends, forming ways adapted to receive and hold the ends of the concave sections or bars D. The inner end of each of said bearers is provided with a perforation and is pivotally mounted on a stud a which extends in from each side of the frame. A projection is formed on the lower front corner of each of said plates C, which is slotted and a pin 0 extends through said portion across the slot.

A lever 1 with a forked front end engages said pin of each plate, each of said levers being pivoted on a pin 2, the opposite end eX tending over the front sill of the frame and being formed with a hook. A link 3 engages with said hook at one end, and a hook on the outer end of a lever 4, which is pivotedto the front of the machine on a pivot 5. Each of said levers 4 extends to near the center of the machine and engages with a socket in the side of a nut 6, mounted on a screw 7, which in turn is mounted in a housing 8 on the front of the machine in a central position. A crank 9 is provided on the lower end of said screw for turning it, and elevating or depressing said-nut, and the ends of the lovers 4 connected therewith, and through them the outer ends of the concave bearing plates C, as will be readily understood. In order to allow for end-wise play a space is left between the plates C and the sides of the frame, and appropriate adjusting devices are provided, such as the set-screws 10, 11, and 12, mounted in screw-threaded perforations extending through bosses on the sides of said frame opposite said plates, said set-screws being arranged preferably as shown, at points of a triangle, and extend in towards said plates, a jam nut y' being mounted 011 each to secure it in the desired adjustment. Between the inner ends of these set-screws and the plates 0 are inserted the wedgelates C, which are formed with inclined caring surfaces for the ends of said setscrews, surrounded by a flange The form of these plates and the inclined or wedge shaped bearing faces is best shown in Figs. 4 and 5. One of said plates is inserted between each plate C and the ends of the setscrews in the adjacent side of the frame, said ends being inserted within the flanges f and thus support said plates when the parts are loosened. On the front end of each of said plates C is formed an eye 0 by which the plate may be drawn out or pushed in to loosen or tighten the parts.

In Fig. 6 is shown a pivoted bar 15 having two wedged shaped points 16 and 17 adapted to be inserted between the side of each plate C and the adjacent set-screws 10 and 11. Such a form is found very effectual although but two bearing points are provided instead of three as in the use of the plate C. On Fig. 6 I have indicated the position of the set screws 10, 11, and 12 by dotted circles.

The concave sections D are or may be of any appropriate form, preferabl bars bearing the usual or appropriate teet 1, and I prefer to have a bar or section to each row of teeth in order that only that section requiring removal or repairing need be handled in the work. The ends of the sections or bars fit closely within the way formed by the flanges c on the plates C, and when the parts are tightened, they are clamped between said plates.

In operation, the parts being assembled and it being desired to remove the concave sections, the wedge pieces C are drawn back to relieve any end -wise binding and the screw 7 is turned to permit the outer ends of the plates C to fall down away from the cylinder, when the concave sections can be readily withdrawn. When the sections are placed in position the screw 7 is turned in the opposite direction to elevate said plates to bring the concave into a proper position in relation to the cylinder, and the wedge plate is forced in to tighten the parts. By this arrangement the concave is rendered susceptible of quick and easy access and repair, while at the same time it is firmly and rigidly supported during operation.

Having now fully described my said invention, what I claim as new and desire to secure by Letters Patent, is

1. In a threshing machine, the combination, of the concave bearers pivoted at their inner ends, separate longitudinal levers mounted on pivots and extending in line with said concave bearers the outer ends of which are connected by a pin and slot enl l l E with a nut, and a screw engaging gagement to and are supported by said levers, transversely extending levers pivoted on the front of the frame and connected at their outer ends'with the outer ends of said longitudinal levers and at their inner ends with said nut for operating it in a vertica direction, whereby said levers and concave bearers may be adjusted, substantially as set forth.

2. In a threshing machine, the combination, of the frame, the concave bearers pivoted at their inner ends, levers pivoted in line with said bearers engaging at one end the free ends of said bearers and at their other ends connected by suitable parts with a nut on a vertical screw, by which said bearers may be adjusted and held in adjusted position, and adjustable wedge shaped parts between the bearers and tightening screws, substantially as set forth.

3. In a threshing machine the combination, of the concave bearers pivoted at one end and adjustably supported at the other, wedge-plates alongside said bearers, and adjusting devices between the wedge-plates and the adjacent sides of the frame to bear against said plates, substantially as set forth.

4. In a threshing machine, the combination, of the concave bearers adjustably supported, wedges adapted for insertion alongside said bearers, adjustable parts between the wedge-plates and the adjacent sides of the frame, said adjustable parts being adapted to furnish one side of the bearing for said wedges, substantially as set forth.

5. In a threshing machine, the combination, of the concave bearers pivoted at one end and adjustably supported at the other, the wedge-plates formed with several inclined surfaces and adapted to be inserted alongside said bearers, and adjustable setscrews mounted in the adjacent sides of the frame with their points adapted to rest against said inclined surfaces, substantially as set forth.

In witness whereof, I, have hereunto set my hand and seal at WVaynesboro, Pennsylvania this, 3d day of December, A. D. one thousand nine hundred and one.

FRANK F. LANDIS.

I/Vitnesses:

C. E. MENTZER, ALF. N. RUssELL. 

